Date: Fri, 24 Jul 2009 01:23:18 +0200 From: =?UTF-8?Q?St=C3=A5le_Lyngaas?= <staale@lyngaas.com> To: Garrett Cooper <yanefbsd@gmail.com> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Annoying whitenoise sound coming from snd_hda enabled chipset Message-ID: <558ffc2b0907231623v2bad80bbref035bd1fd950d39@mail.gmail.com> In-Reply-To: <7d6fde3d0902210101yfb42ff6yd0aa31e6f16b5761@mail.gmail.com> References: <7d6fde3d0902210101yfb42ff6yd0aa31e6f16b5761@mail.gmail.com>
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On Sat, Feb 21, 2009 at 11:01 AM, Garrett Cooper<yanefbsd@gmail.com> wrote:
> I don't know how else to describe it, but when I turn up my
> speakers enough (50%+) and don't have any sound playing, I hear a
> whitenoise hiss coming out of them. When I change webpages (nvidia
> driver is GIANT locked) or do something else kernel intensive it stops
> for a brief second, but apart from that it's an annoying trill sound
> almost like a mosquito humming around me waiting to be swatted.
I suspect this is due to the CPU executing the HLT instruction.
Try running the following command:
sysctl machdep.cpu_idle_hlt=0
--
Ståle Lyngaas
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